Air-feeding device



J. Y. KING.

AIR FEEDING DEVICE.

APPLICATION FILED 050.23, 1920.

1,405,520, Patented Feb. 7, 1922.

UNETED STATES QFFEQEQ JOHN Y. KING, or LANsnown PENNSYLVANIA.

Specification of Letters Patent.

AIR-FEEDING DEVICE.

Patented Feb. *7, 1922-.

Application filed December 23, 1920. Serial No. 432,710.

provide an exceedingly simple and effective device of this description which may be readily applied to the door of a coal burning furnace and which when so applied will project streams of highly heated air over the fire bed in such manner as to intermingle and combine such air with the gases of combustion causing the latter to burn with intense heat and thus prevent the escape of unburned carbon in the form of smoke orsoot.

A further object of my invention is to provide simple and. effective means for regulating the flow of air to the device.

A still further object of my invention is to provide simple and efi'ective means for attaching the device to the furnace door.

l/Vith these and other objects in view, this invention consists in the details of construction and combination of elements hereinafter set forth and then specifically designated by the claims.

r In order that those skilled in the art to which this invention appertains, may understand how to make and use the same, I

will describe its construction in detail, referring'by numerals to the accompanying drawing forming apart of this application, in which Fig. 1, is a perspective of an air feeding device made in accordance with my improvement.

Fig. 2, is a central longitudinal section of the device, a portion of a furnace door being shown to which the device is attached.

Fig. 3, is a face view of the air regulating disc.

In carrying out my invention as here embodied, 1 represents the body or reservoir of the device which is in the general shape of an elongated casing having a hollow interior 2 into which the air is fed.

3 represents a shank in the form of a tube or pipe having its inner end threaded as indicated at 4 for screwing into the internally threaded boss 5 formed with the easing, while the outer end of the pipe is threaded as indicated ate.

7 represents a flared intake member having an internally threaded hub 8 adapted to screw upon the outer end of the pipe 3 and to this intake member is pivoted the regulating disc 9 so as to enclose the interior of.

the intake member, thereby providing a relatively large space 10 into which the air first passes and from which it fiows through the pipe 3 to the interior of the casing 1. This regulating disc has a slot 11 formed therein through which the rivet 12 passes, said rivet being secured in the flange 13 of the intake member; this slot being of such shape as to permit the regulating disc to entirely close the front of the intake memher when the rivet is in the upper portion of said slot, while said regulating disc will leave uncovered a certain portion of the intake member when the rivet is in the lower portion of said slot.

A small hole 14 is formed through the regulating disc, said hole having the capacity for normally feeding air to the dev1ce.

15 represents a nut run upon the threads 6 for coacting with the intake member to secure the device to the furnace door 16. lhis securement being effected by removing the intake member from the thread 6, passing the outer end of the pipe through a suitable hole formed in the door and then replacing the intake membferand screwing it up so as to draw the nut 15 firmly against the inner face of the door. In order that, the device may not he accidentally displaced by jaror V vibration, Ipreferto-interpose a split spring washer 17 between the inner face of the hub 8 and the outer face of the door so that when the intake member has been screwed home this washer will act as a friction lock.

j In practice when the device is applied to a furnace door and the door is closed the casing 1 projects into the furnace above the coal bed and air flowing into the space 10in the intake is gradually expanded by the heat transmitted to, this intake member and from thence this air passes through the interior of the pipe 3 constantly absorbing a greater amount of heat thereby being expanded until it flows into the reservoir of the casing where it will be superheated and thereby further expanded and finally issuing from the lire bed will produce perfect com-- bustion of said heat.

The effectiveness of this device depends upon the principle of providing an unol structed and unbailied direct passage for the inflowing air which passage permits the air to reach the expansion chamber without being retarded and permits the air. to expand suddenly, thereby creating sui'iicient pressure to deliver jets of highlyheated air of such light density over the lire bed as to gases resulting in intense intensify the combustion after the manner of a blow pipe. Long experience and exhaustive experiment has shown that this result cannot be obtained when-the incoming air is bailled or caused to follow a cir -cuitous route and that it essential to supply the gases during combustion with a very small amount of air by weight in a highly heated state and at l1l l1 speed and this can only be accomplished by feeding the in flowing air directly and unobstructedly to the expansion chamber, for if the air is battled or caused to flow through a circuitous passage. its temperature will be gradually raised so that when it reaches the point of deliver it will not be suddenl ex aanded to a large degree and the delivery will not be at a high speed which is essential to ob taining the desired results.

Ofucourse I do not wish to be limited to .the exact details of construction as herein shown as these may be varied within the limits of the appended claims without departing from the spirit of my lnventlon.

Having thus fully described my invention,

.what I claim as new and useful is 1-- 1. An air feeding device comprising an elongated rectangular body having holes through one of its longer sides and provided with an internally threaded boss on the other longer side, the interior oi said body being unobstructed, a pipe, the inner end thereof having threaded-connection with said boss to'provide an unobstructed air conduit to the interior of the body, a sepa- Leosteo rate flared intake member having threaded connection with the outer end of sald plpe, and means also having threaded connection 3 with the outer end of-said pipe and coacting with said intake member and an appli ance to which the device is secured.

2. A device of the character stated consisting of an elongated rectangular body adapted to be located above a tire bed in a horizontal plane, said body having an unobstructed hollow interior with outlet holes leading therefrom through one of its longer sides in a horizontal line, an unobstructed straight conduit leading directly into the interior of said body at a point opposite the inner end thereof having threaded connection with said boss to provide an unobstructed air conduit to the interior of said hollow body, a separate intake member connected to the outer end of said pipe and means coacting with said intake member also connected with said pipe.

4. An air feeding device comprising a hollow rectangular body forming an air reservoir, holes through oneot the longer sides oi? said hollow body, a pipe connected to the other longer side of said hollow body for feeding air to said reservoir and forming an unobstructed passage for the air through said pipe to the reservoir to permit a sudden expansion of the air at its point of del very, and regulating means on the other end of sald pipe.

in testimony whereof, I have hereunto afiiXed my signature, W a

' JOHN Y. KING. 

